How often should the AEC system be calibrated for accurate results?

The correct response indicates that the AEC (Automatic Exposure Control) system should be calibrated annually to ensure accurate results. Regular calibration is essential for maintaining the precision and reliability of the AEC system, as factors such as age, wear, and environmental conditions can affect its performance. Annually calibrating the AEC allows for adjustments to be made based on any changes in system performance, which helps in optimizing exposure settings and achieving consistent imaging quality.

While it is important to perform maintenance checks more frequently, such as weekly or monthly, these do not equate to a full calibration, which is a more comprehensive process. Calibration can ensure that the system accurately responds to the required radiation levels based on the parameters set for imaging procedures. Calibration as needed might lead to inconsistencies if it is not conducted at regular intervals, as it could result in unmonitored drift in the system's functioning over time.